Stop for universal bars of type-writing machines.



W. P. KIDDER & G.-W. SPONSEL. R UNIVERSAL BARS OF TYFE WRITING11111011111 STOP F0 1905. RENEWED JUNE 3, 1910,

APPLIQATION FILED SEPT. 11 Patented Jan. 17, 1911.

2 SHEETS-SHEET 1.

COO

/%l /VVEIVEOH$ ATTORNEYS WEE;

WITNESSES.

W. P. KIDDER & 0. W1 SPONSEL.

STOP FOR UNIVERSAL BARS OF TYPE WRITING MACHINES. APPLIOATION FILEDSEPT. 11, 1905. RENEWED JUNE 3, 1910.

2 SHEETS-SHBET 2.

WITNESSES.

ggiziygw m 1011's A 7 TUBA/5V5 Patelltfid. Jan. 17,1911.

. elements and arran of such construction as UNITED STATES PATENTOFFICE.

OF HARTFORD, CONNECTICUT}.

wnLLmeroN r. xrnnnn, or Bos'roN, massacrrusnr'rs, AND cHAnLns w.sroNsnL,

assronons, BY.M1NE nssronmnn'rs,

TO THE NOISELESS TYPEWRITEB- COMPANY, OF MIDIDl'ali'l-ONN', CONNECTICUTLCOBPOEA- 'IION OF CONNECTICUT.

I .s'ror ron unrvnnsansans or 'rYPE-wnrrmoi macnmns;

Application filed September 11, 1905,

Specification of Letters Patent.

Patented Jan. 17, 1911.

Serial No. 277,914. Beneviedl'une 8, 1810. Serial No. 564,855.

To all whom it may concern:

Be it known that we, 'WELLINGTON P. Kinmm and CHARLES W. Sronsrn,residing, re- ?pectively, at Boston, in the county of Sufolk and Stateof Massachusetts, and Hartford, in the county of Hartford and State ofConnecticut, have invented certain new and useful Improvements in topsfor Universal Bars of Type-WVriting Machines, of which the following isa full, clear, and exact description, such as will enable others skilledin the art to which it appertains to make and use the same. t

This invention relates to typewriting machines and particularly to thoseknown as silent typewriters.

It has for one of its objects to providemechanism in a machine of theabove type to substantiall eliminate noise during the operation'of t ema- Another-object is to provide mechanism designed to reduce to aminimum impact or concussion of moving parts during the operation of themachine.

Another object is to provide mechanism adapted silently toarrest thestroke of the universal bar upon which the key levers are supported.

Other objects will be in part obvious and in part pointed outhereinafter.

The invention accordingly consists in the features of construction,combinations of ement of will be exemplified in the mechanismhereinafter to be described, and the scope of the application of whichwill ,be indicated in the a is. illustrated Inthe accompanying drawings,wherein one of the various possible embodiments of our invention, Figure1 is a side elevation of the same showing a key lever supported u on theuniversal bar. Fig. 2 is a front e evation of a portion of mechanismshown in Fi tron. elevation similar to ig. 2 but showing a key leverand,the universal bar in a de ressed position. imilar reference charactersrefer to similar parts throughout the several views of the drawings.

Preliminary to a description of the s ecific features of our inventionand inbrder trative em parts which.

.' 1. Fig. 3' is :1

to render certain objects thereof clearer of understandin it may be herenoted that, in machines oft is type wherein a silent operation in allrespects is desired, it is of rime importance that the stroke of the keyevers 1 be arrested without impact or concussion; In the accomplishmentof thisand other advantageous results, we have found it desirable toarrange a sto in the ment of the universa bar sue that a downward strokethereof, when one of the ke levers supported thereon is depressed, wil.be yieldingly resisted ed without impact or concussion, insuring apractically silent operation. i v The above and other advantages aresecured in constructions of the nature of that hereinafter described.

Referring now to the drawings, a portion of the, frame of the machine isrepresented at A, and extending between the side walls thereof is a rod1 to which the ends of key levers 2 are pivoted, as clearly shown inFig. 1. The key levers rest upon a universal bar B, whichis sus ended bylinks 3 from rocker levers 4, whic are in turn suitably connected to thespacing mechanism, ribbon feeding mechanism, or other operative parts ofthe machine usually directly or indirectly the universal bar. In thisilluswe have shown but one this illustration being operated b hodiment,levers,

of the ke deemed su cient for the complete disclosure of our invention,as it will be readily understood that the others in the set or seriesare of similar construction and similarly mounted.

Each of key levers 2 is connected by means of a rod 5 to its respectivetype bar actuatin mechanism.- A cushion 6 of suitable re at-ivelyresilient material extends along universal bar B and is interposedbetween said universal bar and levers. Universal bar B is provided witrollers 7 in the present instance, two in number, one being arrangednear either end thereof and rotatably mounted underneath said bar u onpins 8 extending transversely of depen ing lugs 9 and 10. Pivotallymounted upon spur screws 11 extending from frame are wiper cams 12, onecam beingarranged directly under each of rollers 7 with'itspivotal pointin exact vertical.

th of move the entire set of key and ultimately arrest 30 points ofcontact upon cams 12 with their alinement with the bearing point of oneof rollers 7. Springs 13 connect lugs 14 upon wiper cams 12 with fixedpoints upon the frame of the machine, as at 15. Each of springs 13 holdsits respective wiper cam in constant engagement with one of rollers 7,as clearly shown in Fig. 2. In this figure,

the parts are'shown in their normal positions, and it will be apparentthat the force exerted by springs 13 will, through wiper cams 12, tendtomaintain universal bar B and the entire set of key levers supportedthereon in their upward or normal position.

' Springs 16 connect each of key levers 2 with a-fixed part of the,machine as at 17 and maintain said key levers in their upward positionwhen the universal bar is depressed.

The surfaces of rollers and cams 12 are preferably hardened to provideagainst wear and minimize friction.

Having thus described our invention, the

' operation thereof, which should be obvious,

is substantially as follows: When one of key levers 2 is depressed fromthe position shown in Figs. 1 and 2, the universal bar is forced therebydownwardly and rollers 7 rollingalong the surfaces of wiper cams 12 willforce said cams downwardly against-the tension of springs 13 until theposition shown in Fig. 3 is attained. In this position, the

respective rollers are upon arcs concentric to the pivotal points ofsaid cams, and further downward movement of the universal bar istherebyprevented as will be apparent. At

this point it may be noted that, during the downward stroke of universalbar B, the

leverage applied upon cams 12 is constantly bar to its normal positionupon the release.-

'ment of pressure upon the key levers or spacing mechanism. Asherembefore ex plained, there is at all times a constant rolling contactbetween the wiper cams and the rollers carried by the universal bar.

It will of course be understood that, While we have shown and describedbut one roller, and its coacting wiper cam and spring, which parts arelocated near one end of the universal bar, the corresponding parts nearthe other end thereof being identical in all respects, and, therefore, adescription of one group will suflice. It is also apparent that, ifdesired, but one roller and its co-acting cam and spring may beemployed, the mechanism being arranged in any desired locationintermediate the ends of the universal bar.

It will, accordingly, be seen that we have provided mechanism welladapted to achieve the objects of our invention characterized by greatsimplicity and efliciency. The elimination of concussion or impactbetween the moving parts insures a silent operation, and the rollingcontact between the rollers and the wiper cams reduces friction to aminimum and insures a ready and quick response of the universal bar tothe touch of the operator or to movement by the spring controlled camswhen the pressure is removed from the key levers.

VVhile we have shown and described our invention as applied toatypewriting machine of the above type, we wish it to be understood thatwe do not intend to limit its employment to this precise relation, asthe same is capable of use in a variety of relations in machines ofdifferent types.

As many changes could be madein the above construction and manyapparently widely different embodiments of our invention could be madewithout departing from the scope thereof, we intend that all mattercontained in the above description or shown in the accompanying drawingsshall be interpreted as illustrative and not in a limiting sense. Wedesire it also to be understood that the language used in the followingclaims is intended. to cover all of the generlc and specific features ofthe invention which, as a matter of language, might be said to falltherebetween. Having thus described our invention,

what we claim as new and desire to secure by Letters Patent, is

1. In a typewriting machine, in combination, a universal bar, a memberrotatably mounted upon said universal bar, a fixed part, and a memberrotatably mounted upon 5 said fixed part, the rotatably mounted membersupon said universal bar and said fixed part co-acting to arrest thedownward stroke of said universal bar.

- 2. In a typewriting machine, in combina- 1 6 tion, a universal bar, amember rotatably mounted upon said universal bar, a fixed part, a memberrotatably mounted upon saidfixed part, the rotatably mounted membersupon said universal bar and said fixed 1'15 part co-acting to'arrest thedownward stroke of said universal bar, and means adapted to hold saidrotatably mounted members in constant engagement with each other.

- 3.111 a typewriting machine, in combination, a universal bar, arotatably mounted member carried thereby, a fixed part, a rotatablymounted member carried by said fixed part, and means for-holding saidmembers in constant engagement thereon, one of said members beingadapted to roll over the surface of the other thereof during the strokeof the universal ba'r, said members coacting to arrest the downwardmovement of said universal bar.

. tion, a movable mem in contact. a

in constant engagement with said roller,

' gagement with said-,roller,-said roller upon member through the mediumof said roller.

- other.

tion, a movable member, a roller carried a mounted member dependin981,657 I v I v 4.- In a typewriting machine, the combination with auniversal bar, of rotatably a mounted means carried thereby, and movablemeans co-acting with 881d rotatably l mounted means to arrest thedownward stroke of said universal bar.

5. In a typewritin machine, in combinar, a fixed part, rotatably mountedmeans upon said fixed part, said rota-tabl mounted means co-acting toarrest the ownward movement of said movable member, and means adaptedyieldingly to hold said rotatably mounted means 6. In a typewritingmachi% in combination, a movable member, a fixed pin; a roller carriedby said movable member, and a cam rotatably mounted upon said fixed in'and held in engagement with said rol er, said cam being adapted by amovement rela-' tive to said movable member to arrest the downwardmovement thereof.

7. In a ty writing machine, in combination, a mova ,le member, afixed'pin, a roller carried by said movable member, a cam rotatablymounted upon said fixed pin and held said cam being adated by a movementrelativeto said movab e member to arrest the downward movement thereof,and a resilient body adapted to maintain said cam and said rol er inconstant engagement with each 8. In a typewriting machine, incombination, a movable member, .a roller carried thereby, a fixed'pivot,and a cam pivotally mounted upon said pivot and-held in ena movement of.said movable member. relative to said pivot being adapted to roll alongsaid cam,'sai d 'cam'being adapted to arrest the downward movement ofsaid movable 9. In a typewriting machine, in combinathereby, a fixedpivot, a cam ivotally mounted upon said pivot and held in im positiveengagement withsaidroller, said roller upon a movement of said movablemember relative to said .pivot being adapted adapted to arrest thedownward movement of said-movable member through the me.- dium of saidroller, and means adapted yieldingly to oppose a pivotal movement ofsaid cam. 10. In a typewriting machine, the combination with theuniversal bar, of a rotatably mounted member de ending therefrom, and awiper cam pivot beneath said member and held in resilient engagementtherewith.

11.. In a typewriting machine, the combi-. nation with the-universalbar, of a rotatably therefrom, a wiper cam pivoted to a fixe portion ofthe frame of the machine beneath said member, and spring means forholding said member and said cam in engagemen. 12, In a typewritingmachine, the combination, a universal bar having a pivot, a pivot fixedto the frame of the maehine,a

roller upon one of said pivots, a-wi r cam means for holding said wipercam an roller in engagement.

13. The combination with a movable part of a typewriting machine, ofmeans for arupon the other of said pivots, an sai resting the movementsthereof without--impact or concussion, comprisin a fixed part, a memberrotatively mounte upon each of said parts, and means'for holding saidrotatively mounted members in constant engagement.

14. The combination with a movablepart of a typewriting machine, ofmeans for arresting the movements thereof without impact or concussion,comprising afixed part, a roller mounted upon one of said parts, an

oscillatory cam member mounted upon the a other of said parts, andspring. means for maintaining a constant engagement between said rollerand said cam.

,15.-.The combination with a movable part of a typewriting machine, ofmeans for artesting the movements thereof, comprising aroller carried bythe movable part, a cam' member mounted to swing uponafixed pertion ofthe machine, and spring means conuhember mounted to oscillate upon afixed portion of the machine and, having a portion of its peripherystruck upon an arcwhich is concentric with its axis of oscillation, saidroller, being adapted to run along theperiphery of said cam'during amovement of the movable part and swingthe sam'e'until -the portionthereof which is concentric with its axis of oscillation is engaged bysaid roller, and spring means connected with said cam member and adaptedto hold the same in constant engagement with said roller.

17. The combination with a movable part of a typewriting machine, ofmeans for arresting movements thereof without impact or concussion,comprising a fixed part," a roller carried by one of said parts, a cammember mounted to oscillate'upon said fixed part andhaving a portio'n ofits peripher struck 'upon' an are which is-concentric wit its axis ofoscillation,- said roller during a movement of said movable part beingadapt ed to run'along the, periphery of said cam member until it isbrought into engagement with the portion of said cam member-, which isconcentric with its axis 'of oscillation, whereupon the movement of saidmovable part Wlll be arres ted,;and a spring con-' necte'd with saidcammember and operating to hold the periphery thereoffin constantengagement with said roller; H 18. 'In a .typewriting machine, thecombination with the universal bar and the key levers which rest uponsaid universal bar, of

meansfor arresting the downward move ments of the key levers withoutimpact or concussion, comprising a roller journaled upon the universalbar, a cam member mounted to oscillate upon a fixed portion of -theframing of the machine, said cam member having a portion of itsperiphery struck 5 upon an are which is concentric with its axis ofoscillation, said roller during a de- 'szud cam member and to assist inthe returnwhen the same has been depressed.

In testimony whereof'we aflix our signa- 3G tures, in the presence oftwowitnesses. I WELLINGTON ,P. KIDDER.

CHARLES W. SPONSEL. Witnesses: l

J Unrus L. BALDW N, HELEN, M. SEAimNs.

ing of the universal bar to normal position

